本文介绍了如何在golang中声明常量映射的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我是golang的新手。我正在努力声明不断进行。但它正在抛出一个错误。任何人都可以帮助我使用声明常量的语法吗?这是我的代码:
const romanNumeralDict map [int] string = {
1000:M,
900:CM,
500:D,
400:CD,
100:C,
90:XC,
50:L,
40:XL,
10:X,
9:IX,
5:V,
4:IV,
1:I,
$ / code>
这是错误
#命令行参数
./Roman_Numerals.go:9:语法错误:意外的{
解决方案
您的语法不正确。要创建一个文字图(作为伪常量),您可以这样做:
var romanNumeralDict = map [int] string {
1000:M,
900:CM,
500:D,
400:CD,
100:C,
90:XC,
50:L,
40:XL,
10:X,
9:IX,
5:V,
4:IV,
1:I,
}
在 func
中,您可以声明它:
romanNumeralDict:= map [int] string {
...
在Go中没有像常量映射那样的东西。有关更多信息,请访问 。
I am new to the golang. I am trying to declare to constant in go. But it is throwing an error. Could anyone please help me with the syntax of declaring a constant in go?
This is my code:
const romanNumeralDict map[int]string = {
1000: "M",
900 : "CM",
500 : "D",
400 : "CD",
100 : "C",
90 : "XC",
50 : "L",
40 : "XL",
10 : "X",
9 : "IX",
5 : "V",
4 : "IV",
1 : "I",
}
This is the error
# command-line-arguments
./Roman_Numerals.go:9: syntax error: unexpected {
解决方案
Your syntax is incorrect. To make a literal map (as a pseudo-constant), you can do:
var romanNumeralDict = map[int]string{
1000: "M",
900 : "CM",
500 : "D",
400 : "CD",
100 : "C",
90 : "XC",
50 : "L",
40 : "XL",
10 : "X",
9 : "IX",
5 : "V",
4 : "IV",
1 : "I",
}
Inside a func
you can declare it like:
romanNumeralDict := map[int]string{
...
And in Go there is no such thing as a constant map. More information can be found here.
Try it out on the Go playground.
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